The group is now survival-oriented. The whole point of voting majorities (to address your question) is that you can more easily accomplish what you want with the principle of strength in numbers(particularly votes).
Great idea in principle, but you are assuming that the voting process is free and fair, when in reality it is rigged by TPTB.
Rather than motivating people to relocate into rural voting blocks (which, in this economy most cannot afford to do any longer), time would be much better spent in developing cohesive community within a rural area rich in natural resources, irrespective of local historical voting patterns.
Once TSHTF, voting will be the least of your worries.
Personally, I threw out the notion that voting "mattered" quite some time ago. Like the rest of everything else in this country, it is a clever fraud to keep us off-balance and powerless.